Air-brake mechanism.



as. BUCK. AIR BRAKE ME'CH-ANISIII. APPLICATION FILED I`|IAY26, I9T7 @wanted Jim. i M918.,

INVEN-TOFI @WMM/w EDWARD S. IBOCK, 0F ELLINWOOD, KANSAS.

AIR-BRAKE MECHANISM.

assenso.

Specification of Letters Patent.

Patented dan., t5, 1918.

Application filed Mav 26, 1917. y Serial lilo. 171,191.

To all whom t may concern:

Be it known that I, EDWARD S. Boon, a citizen of the United States, residing at Ellinwood, in the countyof Barton and State of Kansas, have inventednew andv useful Improvements in Air-Brake Mechanism, of which the following is a specification.

This in vention relates to air brake mechanisms adapted to be used upon automobile machines and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide an air pump mechanism adapted to be applied as stated which serves as means for applying the brakes thereof and also combined features which serve as means forvcushioning the shock of the machine and thereby cause the machine to pass smoothly over rough spots or depressions in the roadway.

To these ends the invention includes a4 cylinder which is mounted upon the frame of the machine and having a piston movably mounted therein. A collar is mounted upon the axle 0f the machine and is operatively connected with the piston. 'The said collar is further connected with the spring of the machine. A tank is mounted upon the frame and a' pipe connects the cylinder with the tank. A spring pressed check valve is located at the top end of the cylinder and prevents the air from returning from the tank to the cylinder. Connections may be provided at the tank for conducting the compressed air to the tires of the machine or to' the brake mechanism as hereinafter de scribed.

In the accompanying drawings Figure 1 is a fragmentary side elevation of the frame of an automobile machine showing the combined air pump and shock absorber applied; v

Fig. 2 is a rear View of the same;

Fig. 3 is a fragmentary side elevation of the same With parts in section;

Fig. l is a detail sectional view of a cylinder used in the shock absorber.

As illustrated in the accompanying drawing, the frame of the automobile machine is indicated at 1 anda cylinder 2 is mounted thereon. The said cylinder is surrounded by iianges or ridges of conventional form Whereby the cylinder is ofr that type generally known as an air cooled cylinder. A piston 3 is slidably mounted in the cylinder 2 and .a rod i 1s pivotally connected at one end with the said piston. Ylfhe other end of the said rodi is pivotally connected With a collar 5 Which is loosely mounted upon the axle of the automobile machine. A spring 6 is connected at its intermediate portion and at one ond with the frame 1 and the other end of the said spring is pivotally connected with the collar 5. As the automobile machine travels over a roadway the spring 6 may flex and the frame 1 may move vertically with relation to the axle upon which the collar 5 is mounted:

A tank Y is mounted upon the frame 1 and a pipe S connects the upper end of the cylinder 2 with the said tank i. A spring pressed valve 9 is located Within the pipe S and mounted at the upper end of the cylinder 2 and serves as means for preventing air from returning from the tank 7 to the interior' of the cylinder 2. The tank 7 is provided with a valve controlled nipple 10 to which a rubber hose may be connected for the purpose of conducting air from the tank to the tires of the automobile machine for the purpose of iniiating the same.

A drum 11 may be attached to one of the ldriving wheels of the automobile machine and brake shoes 12 are pivotally connected together and mounted Within the said drum 11. A cylinder 13 is located between the free end portions of the shoes 12 and pistons 14 are slidably mounted in the said cylinder 13.

- A spring 15 is connected with the pistons 14- and is under tension With a tendency to draw the pistonstoward each other. The cylinder 13 is provided at its sides with a nipple 16 and a pipe may be connected With the said nipple and the tank 7 hereinbefore described. The pipe is also provided with a valve indicated at 1'? and may be manipulated to permit air to iiovv from the tank to the cylinder 1,3 whereby the pistons 11 are spread with relation to each other by the introduction of air from the tank into the cylinder-.13. Links 18 are pivotally connect .ed at one end ivithvthe pistons 14- and pivotally connected at their other ends with the free end portions of the shoes 12. (lensequently it will be seen that when air 1s admitted into the cylinder 13 the pistons are moved away from each other and the links 1S are moved longitudinallyy whereby the shoes 12 are swung and forced into frictional contact with the drum 11 and serve as means for preventing the rotation of the wheel to which the said drum is applied. I

During the travel of the automobile mal f Lacanau chine the frame l moves vertically with relation to the axle uponwhich the collar 5 is mounted and hence the rod t ismoved lon` gitudinally and the piston 3 is reciprocatcd in the cylinder 2. Thus air is compressed in the ylinder 2 and forced by the valve 9 and through'the pipe 8 into the tank 7.

From the foregoing description taken in conjunction with the accompanying drawing, it will be seen that a combined brake, air pump and shock absorber of simple and durable structure is provided, and that the same may be uscdto advantage upon an'aut'omobile machine whereby the body of the vehicle is carried evenly and at the same time has all of the advantages ofthe resil-- iency of the'springs which support the same. The return or recoilfllncldent to such springs 1s overcome so that danger of breaking is obviated and the objectional throw of such eliminated.

tank adapted to bevap'plid to the frame of'a' machine, a drum adaptedtojbe connected with the wheel of the machine, shoes pivotally mounted Within the drum, a cylinder located within the drum,l said c linder being open at its ends, means for lea ing air from the tank to the last mentioned cylinder at a "point between the ends thereof, pistons movl ably mounted in the last mentioned cylin.

der, a spring located between and connected with the said pistons and being. under tendency to draw the same toward. each other,

andlinks pivotally connected with the said pistons and pivotally connected with the said shoes.

, In testimony whereof I-latfix my signature.

nnwann s. Boon. 

